| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: devmain.c,v 2.5 2016/08/18 00:52:48 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* devmain.c - main for independent drivers. |
| 6 |
* |
| 7 |
* Redefine your initialization routine to dinit. |
| 8 |
*/ |
| 9 |
|
| 10 |
#include "copyright.h" |
| 11 |
|
| 12 |
#include "standard.h" |
| 13 |
|
| 14 |
#include "color.h" |
| 15 |
|
| 16 |
#include "driver.h" |
| 17 |
|
| 18 |
struct driver *dev = NULL; /* output device */ |
| 19 |
|
| 20 |
FILE *devin, *devout; /* communications channels */ |
| 21 |
|
| 22 |
char *progname; /* driver name */ |
| 23 |
|
| 24 |
int r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin(), r_flush(); |
| 25 |
|
| 26 |
int (*dev_func[NREQUESTS])() = { /* request handlers */ |
| 27 |
r_clear, r_paintr, |
| 28 |
r_getcur, r_comout, |
| 29 |
r_comin, r_flush |
| 30 |
}; |
| 31 |
|
| 32 |
|
| 33 |
main(argc, argv) /* set up communications and main loop */ |
| 34 |
int argc; |
| 35 |
char *argv[]; |
| 36 |
{ |
| 37 |
extern struct driver *dinit(); |
| 38 |
int com; |
| 39 |
/* set up I/O */ |
| 40 |
progname = argv[0]; |
| 41 |
if (argc < 3) { |
| 42 |
eputs("arg count\n"); |
| 43 |
quit(1); |
| 44 |
} |
| 45 |
devin = fdopen(atoi(argv[1]), "r"); |
| 46 |
devout = fdopen(atoi(argv[2]), "w"); |
| 47 |
if (devin == NULL || devout == NULL || getw(devin) != COM_SENDM) { |
| 48 |
eputs("connection failure\n"); |
| 49 |
quit(1); |
| 50 |
} |
| 51 |
/* open device */ |
| 52 |
if ((dev = dinit(argv[0], argv[3])) == NULL) |
| 53 |
quit(1); |
| 54 |
putw(COM_RECVM, devout); /* verify initialization */ |
| 55 |
sendstate(); |
| 56 |
fflush(devout); |
| 57 |
/* loop on requests */ |
| 58 |
while ((com = getc(devin)) != EOF) { |
| 59 |
if (com >= NREQUESTS || dev_func[com] == NULL) { |
| 60 |
eputs("invalid request\n"); |
| 61 |
quit(1); |
| 62 |
} |
| 63 |
(*dev_func[com])(); /* process request */ |
| 64 |
} |
| 65 |
quit(0); /* all done, clean up and exit */ |
| 66 |
} |
| 67 |
|
| 68 |
|
| 69 |
void |
| 70 |
quit(code) /* close device and exit */ |
| 71 |
int code; |
| 72 |
{ |
| 73 |
if (dev != NULL) |
| 74 |
(*dev->close)(); |
| 75 |
exit(code); |
| 76 |
} |
| 77 |
|
| 78 |
|
| 79 |
r_clear() /* clear screen */ |
| 80 |
{ |
| 81 |
int xres, yres; |
| 82 |
|
| 83 |
xres = getw(devin); |
| 84 |
yres = getw(devin); |
| 85 |
(*dev->clear)(xres, yres); |
| 86 |
} |
| 87 |
|
| 88 |
|
| 89 |
r_paintr() /* paint a rectangle */ |
| 90 |
{ |
| 91 |
COLOR col; |
| 92 |
int xmin, ymin, xmax, ymax; |
| 93 |
|
| 94 |
getbinary((char *)col, sizeof(COLOR), 1, devin); |
| 95 |
xmin = getw(devin); ymin = getw(devin); |
| 96 |
xmax = getw(devin); ymax = getw(devin); |
| 97 |
(*dev->paintr)(col, xmin, ymin, xmax, ymax); |
| 98 |
} |
| 99 |
|
| 100 |
|
| 101 |
r_flush() /* flush output */ |
| 102 |
{ |
| 103 |
if (dev->flush != NULL) |
| 104 |
(*dev->flush)(); |
| 105 |
putc(COM_FLUSH, devout); |
| 106 |
sendstate(); |
| 107 |
fflush(devout); |
| 108 |
} |
| 109 |
|
| 110 |
|
| 111 |
r_getcur() /* get and return cursor position */ |
| 112 |
{ |
| 113 |
int c; |
| 114 |
int x, y; |
| 115 |
/* get it if we can */ |
| 116 |
if (dev->getcur == NULL) { |
| 117 |
c = ABORT; |
| 118 |
x = y = 0; |
| 119 |
} else |
| 120 |
c = (*dev->getcur)(&x, &y); |
| 121 |
/* reply */ |
| 122 |
putc(COM_GETCUR, devout); |
| 123 |
putc(c, devout); |
| 124 |
putw(x, devout); |
| 125 |
putw(y, devout); |
| 126 |
fflush(devout); |
| 127 |
} |
| 128 |
|
| 129 |
|
| 130 |
void |
| 131 |
mygets(char *s, FILE *fp) /* get string from file (with nul) */ |
| 132 |
{ |
| 133 |
int c; |
| 134 |
|
| 135 |
while ((c = getc(fp)) != EOF) |
| 136 |
if ((*s++ = c) == '\0') |
| 137 |
return; |
| 138 |
*s = '\0'; |
| 139 |
} |
| 140 |
|
| 141 |
|
| 142 |
void |
| 143 |
myputs(const char *s, FILE *fp) /* put string to file (with nul) */ |
| 144 |
{ |
| 145 |
do |
| 146 |
putc(*s, fp); |
| 147 |
while (*s++); |
| 148 |
} |
| 149 |
|
| 150 |
|
| 151 |
r_comout() /* print string to command line */ |
| 152 |
{ |
| 153 |
char str[256]; |
| 154 |
|
| 155 |
mygets(str, devin); |
| 156 |
(*dev->comout)(str); |
| 157 |
} |
| 158 |
|
| 159 |
|
| 160 |
r_comin() /* read string from command line */ |
| 161 |
{ |
| 162 |
char buf[256], *prompt; |
| 163 |
/* get prompt */ |
| 164 |
if (getc(devin)) { |
| 165 |
mygets(buf, devin); |
| 166 |
prompt = buf; |
| 167 |
} else |
| 168 |
prompt = NULL; |
| 169 |
/* get string */ |
| 170 |
(*dev->comin)(buf, prompt); |
| 171 |
/* reply */ |
| 172 |
putc(COM_COMIN, devout); |
| 173 |
myputs(buf, devout); |
| 174 |
sendstate(); |
| 175 |
fflush(devout); |
| 176 |
} |
| 177 |
|
| 178 |
|
| 179 |
void |
| 180 |
eputs(const char *s) /* put string to stderr */ |
| 181 |
{ |
| 182 |
static int midline = 0; |
| 183 |
|
| 184 |
if (!*s) |
| 185 |
return; |
| 186 |
if (!midline++) { |
| 187 |
fputs(progname, stderr); |
| 188 |
fputs(": ", stderr); |
| 189 |
} |
| 190 |
fputs(s, stderr); |
| 191 |
if (s[strlen(s)-1] == '\n') { |
| 192 |
fflush(stderr); |
| 193 |
midline = 0; |
| 194 |
} |
| 195 |
} |
| 196 |
|
| 197 |
|
| 198 |
sendstate() /* send driver state variables */ |
| 199 |
{ |
| 200 |
putbinary(&dev->pixaspect, sizeof(dev->pixaspect), 1, devout); |
| 201 |
putw(dev->xsiz, devout); |
| 202 |
putw(dev->ysiz, devout); |
| 203 |
putw(dev->inpready, devout); |
| 204 |
} |
